The pink Lake Hiller lake in Western Australia – Scientists have proven the strange pink color is due to the presence of algae which is usually the cause of strange coloration. (Jean Paul Ferrero/Ardea/Caters News)

The Moeraki Boulders of New Zealand – The gigantic boulders started forming on the ocean floor and can now been seen sitting mysteriously on the coastline thanks to centuries of erosion. (Alexandra Sailer/Ardea/Caters News)

The Great Blue Hole in Belize – A large submarine sinkhole which is over 984 feet across and 407 feet deep. The sinkhole was formed during several episodes of quaternary glaciation when sea levels were much lower. (Kurt Amsler/Ardea/Caters News)